Publication: The oldest elasmosaurs (Sauropterygia, Plesiosauria) from Antarctica, Santa Marta Formation (upper Coniacian? Santonian-upper Campanian) and Snow Hill Island Formation (upper Campanian-lower Maastrichtian), James Ross Island
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Fil: O'Gorman, José Patricio. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina.